Most moms switch the order at around 9/10 mos. Some do it earlier some later. As your lo is doing fine with eating solids and the amount he eats is within normal range then I wouldn't switch the order until he shows indication of wanting to switch. As they grow older, then the preference for solids will increase and the amount of baby milk decreases. This may coincides with the dropping of one milk feeding - or combining the two mid-day milk feedings into one.
The main thing to keep in mind is the amount of milk he takes. As bm/formula is should still be the main source of nutrient until 12 mos, try to limit the amount of solids he takes if he decreases his milk intake too quickly.
HTH